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* Touch Controls Hook
*
* Manages touch event handling and gesture recognition for mobile gameplay
* Provides swipe detection, multi-touch support, and touch-based movement
*
* @module hooks/useTouchControls
* @category Mobile Controls
* @korean 터치 컨트롤 훅
*/
import { useCallback, useEffect, useRef, useState } from 'react';
/**
* Gesture types supported by the touch control system
*
* Added tactical step gestures for Korean martial arts footwork:
* - tap-{direction}: Quick tap for tactical 30cm step
* - hold-{direction}: Hold for continuous walk
*
* @korean 제스처타입
*/
export type GestureType =
| 'swipe-right'
| 'swipe-left'
| 'swipe-up'
| 'swipe-down'
| 'two-finger-tap'
| 'tap'
| 'tap-forward'
| 'tap-back'
| 'tap-left'
| 'tap-right'
| 'tap-forward-left'
| 'tap-forward-right'
| 'tap-back-left'
| 'tap-back-right'
| 'hold-forward'
| 'hold-back'
| 'hold-left'
| 'hold-right';
/**
* Gesture event data
*/
export interface GestureEvent {
/** Type of gesture detected */
readonly type: GestureType;
/** Distance of swipe in pixels (for swipe gestures) */
readonly distance?: number;
/** Coordinates of touch start */
readonly startX?: number;
readonly startY?: number;
/** Coordinates of touch end */
readonly endX?: number;
readonly endY?: number;
}
/**
* Props for useTouchControls hook
*/
export interface UseTouchControlsProps {
/** Callback when gesture is detected */
readonly onGesture: (gesture: GestureEvent) => void;
/** Whether touch input is enabled */
readonly enabled?: boolean;
/** Minimum swipe distance in pixels (default: 50) */
readonly minSwipeDistance?: number;
/** Maximum time for tap in ms (default: 300) */
readonly maxTapDuration?: number;
/** Time threshold for hold vs tap in ms (default: 200) */
readonly holdThreshold?: number;
/** Enable haptic feedback for steps (default: true) */
readonly enableHaptics?: boolean;
}
/**
* Return type for useTouchControls hook
*/
export interface UseTouchControlsReturn {
/** Whether a touch is currently active */
readonly isTouching: boolean;
}
/**
* Custom hook for handling touch controls and gesture recognition
*
* Features:
* - Swipe detection (horizontal and vertical)
* - Two-finger tap detection for vital point mode
* - Single tap detection
* - Tactical step gestures (tap) vs continuous walk (hold)
* - Distance calculation for swipe intensity
* - Configurable thresholds
* - Haptic feedback for tactical steps
*
* Gesture Mapping:
* - Swipe Right: Advance toward opponent
* - Swipe Left: Retreat from opponent
* - Swipe Up: High stance mode
* - Swipe Down: Low stance mode
* - Two-Finger Tap: Activate vital point targeting mode
* - Single Tap (directional): Tactical 30cm step (전술적 발걸음)
* - Hold (directional): Continuous walk movement
*
* @example
* ```typescript
* const { isTouching } = useTouchControls({
* onGesture: (gesture) => {
* switch (gesture.type) {
* case 'tap-forward':
* handleTacticalStep('forward'); // 전진보법
* break;
* case 'hold-forward':
* handleContinuousWalk('forward');
* break;
* case 'two-finger-tap':
* activateVitalPointMode();
* break;
* }
* },
* enabled: !isPaused,
* holdThreshold: 200, // 200ms to distinguish tap from hold
* enableHaptics: true,
* });
* ```
*
* @public
* @korean 터치컨트롤사용
*/
export function useTouchControls({
onGesture,
enabled = true,
minSwipeDistance = 50,
maxTapDuration = 300,
holdThreshold = 200,
enableHaptics = true,
}: UseTouchControlsProps): UseTouchControlsReturn {
const touchStartRef = useRef<Touch | null>(null);
const touchStartTimeRef = useRef<number>(0);
const [isTouching, setIsTouching] = useState<boolean>(false);
const holdTimerRef = useRef<number | null>(null);
/**
* Trigger haptic feedback for tactical step
* Light vibration (10ms) to confirm step input
*
* @korean 햅틱피드백
*/
const triggerStepHaptic = useCallback(() => {
Eif (!enableHaptics || !navigator.vibrate) return;
try {
// Short, light vibration for step (10ms)
navigator.vibrate(10);
} catch (error) {
// Haptic feedback not supported or failed
console.debug('Haptic feedback not available:', error);
}
}, [enableHaptics]);
/**
* Determine directional gesture from touch position
* Used for D-pad style controls
* Returns null for ambiguous/stationary taps
*
* @korean 방향제스처감지
*/
const getDirectionalGesture = useCallback((
startX: number,
startY: number,
endX: number,
endY: number,
isTap: boolean
): GestureType | null => {
const deltaX = endX - startX;
const deltaY = endY - startY;
const absX = Math.abs(deltaX);
const absY = Math.abs(deltaY);
// If movement is too small, it's not a directional gesture
const minDirectionalMovement = 15; // pixels
if (absX < minDirectionalMovement && absY < minDirectionalMovement) {
return null; // Ambiguous tap, not directional
}
// Check for diagonal gestures (45-degree threshold)
const isDiagonal = absX > 20 && absY > 20 && Math.abs(absX - absY) < 30;
const prefix = isTap ? 'tap' : 'hold';
Iif (isDiagonal) {
// Diagonal gestures (only for taps/steps)
if (isTap) {
if (deltaY < 0 && deltaX < 0) return 'tap-forward-left';
if (deltaY < 0 && deltaX > 0) return 'tap-forward-right';
if (deltaY > 0 && deltaX < 0) return 'tap-back-left';
if (deltaY > 0 && deltaX > 0) return 'tap-back-right';
}
return null;
}
// Cardinal directions
if (absX > absY) {
// Horizontal
return deltaX > 0 ? `${prefix}-right` as GestureType : `${prefix}-left` as GestureType;
} else E{
// Vertical
return deltaY < 0 ? `${prefix}-forward` as GestureType : `${prefix}-back` as GestureType;
}
}, []);
/**
* Handle touch start event
*/
const handleTouchStart = useCallback((e: TouchEvent) => {
Iif (!enabled) return;
const touch = e.touches[0];
touchStartRef.current = touch;
touchStartTimeRef.current = Date.now();
setIsTouching(true);
// Check for two-finger tap immediately
if (e.touches.length === 2) {
e.preventDefault();
onGesture({
type: 'two-finger-tap',
startX: touch.clientX,
startY: touch.clientY,
});
return;
}
// Capture screen dimensions at touch start time to prevent incorrect
// direction calculation if window is resized during hold
const screenCenterX = window.innerWidth / 2;
const screenCenterY = window.innerHeight / 2;
// Set up hold detection timer
// Note: Hold gesture direction is determined from the initial touch position
// relative to screen center. This supports D-pad style layouts where each
// region of the screen (or an overlaid control) corresponds to a cardinal direction.
holdTimerRef.current = window.setTimeout(() => {
// Touch held for longer than threshold - trigger hold gesture
// Check touchStartRef to ensure touch hasn't ended before timer fired
Eif (touchStartRef.current) {
const { clientX, clientY } = touchStartRef.current;
// Use captured screen center coordinates (from touch start time)
const deltaX = clientX - screenCenterX;
// Invert Y so that a touch higher on the screen is considered "forward"
const deltaY = screenCenterY - clientY;
const holdGesture: GestureType =
Math.abs(deltaX) >= Math.abs(deltaY)
? (deltaX > 0 ? 'hold-right' : 'hold-left')
: (deltaY > 0 ? 'hold-forward' : 'hold-back');
onGesture({
type: holdGesture,
startX: clientX,
startY: clientY,
});
}
}, holdThreshold);
}, [enabled, onGesture, holdThreshold]);
/**
* Handle touch end event
*/
const handleTouchEnd = useCallback((e: TouchEvent) => {
Iif (!enabled || !touchStartRef.current) return;
const touchEnd = e.changedTouches[0];
const touchStart = touchStartRef.current;
const touchDuration = Date.now() - touchStartTimeRef.current;
// Clear hold timer
Eif (holdTimerRef.current) {
clearTimeout(holdTimerRef.current);
holdTimerRef.current = null;
}
// Calculate deltas
const deltaX = touchEnd.clientX - touchStart.clientX;
const deltaY = touchEnd.clientY - touchStart.clientY;
const distance = Math.sqrt(deltaX * deltaX + deltaY * deltaY);
// Reset touch state
setIsTouching(false);
// Detect gesture type
if (distance >= minSwipeDistance) {
// Swipe gesture (for quick directional inputs)
e.preventDefault();
// Determine primary direction
if (Math.abs(deltaX) > Math.abs(deltaY)) {
// Horizontal swipe
if (deltaX > 0) {
onGesture({
type: 'swipe-right',
distance,
startX: touchStart.clientX,
startY: touchStart.clientY,
endX: touchEnd.clientX,
endY: touchEnd.clientY,
});
} else {
onGesture({
type: 'swipe-left',
distance,
startX: touchStart.clientX,
startY: touchStart.clientY,
endX: touchEnd.clientX,
endY: touchEnd.clientY,
});
}
} else {
// Vertical swipe
if (deltaY > 0) {
onGesture({
type: 'swipe-down',
distance,
startX: touchStart.clientX,
startY: touchStart.clientY,
endX: touchEnd.clientX,
endY: touchEnd.clientY,
});
} else {
onGesture({
type: 'swipe-up',
distance,
startX: touchStart.clientX,
startY: touchStart.clientY,
endX: touchEnd.clientX,
endY: touchEnd.clientY,
});
}
}
E} else if (touchDuration <= maxTapDuration && touchDuration < holdThreshold) {
// Quick tap - tactical step gesture
e.preventDefault();
const tapGesture = getDirectionalGesture(
touchStart.clientX,
touchStart.clientY,
touchEnd.clientX,
touchEnd.clientY,
true // Is a tap
);
if (tapGesture) {
// Directional step tap
triggerStepHaptic();
onGesture({
type: tapGesture,
startX: touchStart.clientX,
startY: touchStart.clientY,
endX: touchEnd.clientX,
endY: touchEnd.clientY,
});
} else {
// Generic tap (fallback)
onGesture({
type: 'tap',
startX: touchStart.clientX,
startY: touchStart.clientY,
endX: touchEnd.clientX,
endY: touchEnd.clientY,
});
}
}
// Clear touch start reference
touchStartRef.current = null;
}, [enabled, minSwipeDistance, maxTapDuration, holdThreshold, onGesture, getDirectionalGesture, triggerStepHaptic]);
/**
* Handle touch cancel event
*/
const handleTouchCancel = useCallback(() => {
// Clear hold timer
Eif (holdTimerRef.current) {
clearTimeout(holdTimerRef.current);
holdTimerRef.current = null;
}
touchStartRef.current = null;
touchStartTimeRef.current = 0;
setIsTouching(false);
}, []);
/**
* Setup touch event listeners
*/
useEffect(() => {
if (!enabled) return;
const options: AddEventListenerOptions = {
passive: false, // Allow preventDefault for gesture handling
};
document.addEventListener('touchstart', handleTouchStart, options);
document.addEventListener('touchend', handleTouchEnd, options);
document.addEventListener('touchcancel', handleTouchCancel, options);
return () => {
document.removeEventListener('touchstart', handleTouchStart);
document.removeEventListener('touchend', handleTouchEnd);
document.removeEventListener('touchcancel', handleTouchCancel);
};
}, [enabled, handleTouchStart, handleTouchEnd, handleTouchCancel]);
return {
isTouching,
};
}
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